Improvement in grinding-mills



A. H. WAGNER'.

Grinding Mill.

Patented June 2, 1863.

i mographer. whznsnn, D. C.

UNITED STATES PATENT OFFICE.

AUSBERT H. WAGNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHAI". KAESTNER AND AUGUST KAESTNER, OF SAME PLACE.

IMPROVEMENT IN GRINDING-MILLS.

Specification forming part of Letters Patent No. 38,795, dated June 2, 1863.

To all whom it may concern:

Be it known that 1, AUsBER'r H. YWaerme, of Chicago, in the county of Cook and State of Illinois, have invented a new, useful, and

Improved Grinding-Mill; and I do hereby decla-re that the same is described and represented in the following specification and drawings.

To enable others skilled in the art to make and use my improved mill, I will proceed to describe its construction and operation, referring to the drawings, in which the same letters indicate like parts in each of the gures.

Figure l is an elevation of my improved mill. Fig. 2 is a plan or top view. Fig. 3 is a section of Fig. 1, cut perpendicularly through the center.

The nature of my invention consists in the improvements hereinafter described and claimed.

In the accompanying drawings, A is ametal bed-plate, supported by three legs, B B, which plate is made circular, with the shaft C firmly fastened in its center. The bed or stationary stone D is provided with a metal bushing, E, made in the form shown in Fig. 3, which bushing supports the stone by resting on the movable collar F, which is fitted to traverse on the shaft C, and is raised by the U-frame G, which has two arms passing up through the plate A, as shown in the drawings. The lower part of the frame G is curved downward, and rests on the lever H, which curves upward, so that the frame is free to rock on the lever in one direction, and the collar F is free to rock on the arms of the frame G at a right angle to the rocking of the frame on the lever, and the top of the collar F is spherical, so that the bushing of the stone will tilt or vibrate freely on it, (the collar F,) so that the rocking of the frame G on the lever, and the rocking of the collar F on the frame, and the free vibration of the bushing E on the collar, allows the stone D to adjust its surface to the surface of the revolving stone I with the greatest ease and freedom. The fulcrum of the lever H is the bracket J, fastened to the plate A, and

the end of the lever H is hinged to the adjusti ng-screw K, which passes up through the stand L, and is provided with a hand-wheel nut, M. By turning this wheel the miller can raise or lower the stone D at pleasure. There are two or more pins, N N, fastened in the under side of the stone D, and project down through the plate A to prevent the stone D from turning. The shaft C is perforated from the top, as shown at P, with one or more openings, It, for the grain which descends through P to pass out and between the stones, and when it is ground it passes out of the spout S. The cylindrical shaft T turns freely on the stationary shaft C, and is provided with a flange, U, to which iiange the stone I' up by the stone D, I cut a screw on the top of the shaft C, and t the nut Y to it, and make a recess in the end of the shaft T for the lower end of the nut Y, as shown in the drawings, Fig. 3. The casing a around the stone-D is fastened to the flange?) on the plate A, and the casing c is fitted to the top of the casing a to cover the stone I. There are two brackets, d, fastened to the case a, to receive the ends of the standards e e of the hopper-frame, which standardssupport the top, f, as shown in the drawings. The hopper g is tted into the topf, and the rear end of the shoe It is hung to the top of the lever t', which vibrates on the screw j inthe bark, between the standards e e, and is moved by the lever l, which vibrates on the screw m in the case c, and is operated by the tappets n n on the shaft T, and by the spring p, fastened to the bar k, and shown in dotted lines in Fig. 3. The front end of the shoe It is supported by the cord g from the shaft r, which is provided with a hand-wheel, s, to turn it and adjust the shoe. The grain falls from the shoe 7L into the funnel t, through which it passes down the opening P, and out through the opening R to the stones. There is a circular cup or trough, u, around the shaft C, above the opening R, to catch any oil which may run down the shaft and prevent it from coming in contact with the grain.

I believe I have described and represented ary shaft, the metal bed-plate to which it is my improvements in grinding-mills so as to fastened. enable any person skilled in lthe art to make In testimony that the foregoing is a specifiand use Ithem Without further invention or eX- cation of my improved mill I have hereunto periment, and I `Will now state what I desire signed my name before two Witnesses.

1 y to seoule by Let-tere l a-tent-to wlt, I claim. AUSBERT H' WAGNER x l. The nut on the top ofthe hollow shaft, to hold down the running stone and prevent the Witnesses:

stationary stone from lifting` or raising it. CONRAD L. DIEHL, r

In combination with the hollow station CHARLES KAERTNER. 

